Process of and mixture for increasing the durability of linings of furnaces or ovens and the like



106. COMPOSITIONS,

COATING R PLASTIC- Examm-Br Patented Mar. 24, 1931 f p UNITED STATES .P..A'l -E NI;QFFICE mmx aosnrn humans, or .nnnssnts momm rnocnss or AND MIXTURE For: moams'ine THEQDUR AB'ILITY or Lmrivos or FUR- I JSACES on ovmrs AND m Lure Ho Drawing. Application filed Inly 20,- 1928, Serial No. 294,313, and inJBelgimn July 29, 1927.

Q My present invention relates to a new rac': "K r'csce'ss of increasing the life of fire roof ess of increasing the durability of the soles materials, particularly those from whic the of flatting furnaces, the so-called" flatting soles of-fiatting-iurnaces for reheating glass plates on which the glass sheets or plates or sheets or plates vor any..0ther fireproof linings 0 special glasses are flattened by reheating. are made, which consists in impregnating 50 i It has already been sug ested to polish such such fireproof parts with a mixture of silicate fiatting plates or stones ymeans'of soluble of potash and silicate of soda in petroleum,

glass or silicate of soda'by the admixture of substantially as set forth. certain bodies which when used according to----lnitestimony'whereof;I have hereunto set the usual polishing process enable-the stone' m jliand. Y a p 55 to be polished upon repeated treatmentsLIn 7;; an}. W E JOSEPH M A 1 HERBE this process the fiatting stone will be coated 5 1 with a thin hard film of soluble glass which however will subsequently be scaled by the e action of heat and stick to the "glass. f 7 I j 60 i The object of my invention is to consider-f ably increase the life of the fiatting stones and this result will be obtained by impregnating' O the stones either with silicate of otash or silicate of soda or a miiture oi oth subi stances in such a way that the'silicate will pass through the full thickness of the stones and be dried within the same, whilstthe top 7 i faces of the stones will remain free fr0m-sil1- i cate, whereby I'obta'in flatting stones the upper inner parts of which will be hardened 7 whilst the top faces thereof will remain free I 5" from silicate, T V.-. i e H..,,M W, .0; 1 In order to enable the stones to be impregnated as described, the sodium silicate, po-

tassium silicate or a mixture thereof will be i emumaccordin gmention, in

mfor instnce etrole and the upper parts oi the stone I "e' pped 80 into this mixture. Preferably the top faces of the stones after being wiped ofi, will not be polished.

By way of example I may mix 90 kilogs. of

40 silicate or silicates, with 15 kilogs. of petroleum, but these proportions may vary between wide limits.

Having now fully described my said in- Y vention, what Iclaim and desire to secure by Letters Patent, is: 

